///*
// * Copyright The OpenTelemetry Authors
// * SPDX-License-Identifier: Apache-2.0
// */
//
//package com.xiashitech.agent.instrumentation.netty.netty_v4_1.client;
//
//import com.xiashitech.agent.instrumentation.netty.netty_v4_1.AttributeKeys;
//import com.xiashitech.agent.instrumentation.netty.netty_v4_common.HttpRequestAndChannel;
//import io.netty.channel.ChannelHandlerContext;
//import io.netty.channel.ChannelInboundHandlerAdapter;
//import io.netty.handler.codec.http.FullHttpResponse;
//import io.netty.handler.codec.http.HttpResponse;
//import io.netty.handler.codec.http.LastHttpContent;
//import io.netty.util.Attribute;
//import io.opentelemetry.javaagent.shaded.io.opentelemetry.context.Context;
//import io.opentelemetry.javaagent.shaded.io.opentelemetry.context.Scope;
//
//import static com.xiashitech.agent.instrumentation.netty.netty_v4_1.client.NettyClientSingletons.HTTP_RESPONSE;
//import static com.xiashitech.agent.instrumentation.netty.netty_v4_1.client.NettyClientSingletons.instrumenter;
//public class HttpClientResponseTracingHandler extends ChannelInboundHandlerAdapter {
//
//  @Override
//  public void channelRead(ChannelHandlerContext ctx, Object msg) {
//    Attribute<Context> contextAttr = ctx.channel().attr(AttributeKeys.CLIENT_CONTEXT);
//    Context context = contextAttr.get();
//    if (context == null) {
//      ctx.fireChannelRead(msg);
//      return;
//    }
//
//    Attribute<Context> parentContextAttr = ctx.channel().attr(AttributeKeys.CLIENT_PARENT_CONTEXT);
//    Attribute<HttpRequestAndChannel> requestAttr =
//        ctx.channel().attr(NettyClientSingletons.HTTP_REQUEST);
//
//    Context parentContext = parentContextAttr.get();
//    HttpRequestAndChannel request = requestAttr.get();
//
//    if (msg instanceof FullHttpResponse) {
//      parentContextAttr.remove();
//      contextAttr.remove();
//      requestAttr.remove();
//    } else if (msg instanceof HttpResponse) {
//      // Headers before body have been received, store them to use when finishing the span.
//      ctx.channel().attr(HTTP_RESPONSE).set((HttpResponse) msg);
//    } else if (msg instanceof LastHttpContent) {
//      // Not a FullHttpResponse so this is content that has been received after headers. Finish the
//      // span using what we stored in attrs.
//      parentContextAttr.remove();
//      contextAttr.remove();
//      requestAttr.remove();
//    }
//
//    // We want the callback in the scope of the parent, not the client span
//    if (parentContext != null) {
//      try (Scope ignored = parentContext.makeCurrent()) {
//        ctx.fireChannelRead(msg);
//      }
//    } else {
//      ctx.fireChannelRead(msg);
//    }
//
//    if (msg instanceof FullHttpResponse) {
//      instrumenter().end(context, request, (HttpResponse) msg, null);
//    } else if (msg instanceof LastHttpContent) {
//      instrumenter().end(context, request, ctx.channel().attr(HTTP_RESPONSE).getAndRemove(), null);
//    }
//  }
//}
